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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 2 — Jan. 10, 1998
  • pp: 296–307

Error Correction for Free-Space Optical Interconnects: Space-Time Resource Optimization

Mark A. Neifeld and Raymond K. Kostuk  »View Author Affiliations


Applied Optics, Vol. 37, Issue 2, pp. 296-307 (1998)
http://dx.doi.org/10.1364/AO.37.000296


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Abstract

We study the joint optimization of time and space resources withinfree-space optical interconnect (FSOI) systems. Both analyticaland simulation results are presented to support this optimization studyfor two different models of FSOI cross-talk noise: diffraction froma rectangular aperture and Gaussian propagation. Under realisticpower and signal-to-noise ratio constraints, optimum designs based onthe Gaussian propagation model achieve a capacity of 2.91 ×10<sup>15</sup> bits s<sup>−1</sup> m<sup>−2</sup>, while therectangular model offers a smaller capacity of 1.91 ×10<sup>13</sup> bits s<sup>−1</sup> m<sup>−2</sup>. We alsostudy the use of error-correction codes (ECC) within FSOIsystems. We present optimal Reed–Solomon codes of various length, and their use is shown to facilitate an increase in both spatialdensity and data rate, resulting in FSOI capacity gains in excess of8.2 for the rectangular model and 3.7 for the Gaussian case. Atolerancing study of FSOI systems shows that ECC can provide toleranceto implementational error sources. We find that optimally codedFSOI systems can fail when system errors become large, and we present acompromise solution that results in a balanced design in time, space, and error-correction resources.

© 1998 Optical Society of America

OCIS Codes
(200.2610) Optics in computing : Free-space digital optics
(200.4650) Optics in computing : Optical interconnects

Citation
Mark A. Neifeld and Raymond K. Kostuk, "Error Correction for Free-Space Optical Interconnects: Space-Time Resource Optimization," Appl. Opt. 37, 296-307 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-2-296


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